IPDISCOVER on duplicate VLAN

Hello all,

Excuse me for my English.

My server:

    Nom du système : Linux x86_64
    Version :3.16.0-4-amd64
    Distribution :Debian GNU/Linux 8 (jessie)

    Version de PHP :5.6.30
    Serveur Web :Apache/2.4.10 (Debian)
    Serveur SQL :(Debian) version 5.5.54-0+deb8u1
    Version OCSReports:2.3.1

OCS Agent 2.3 for Windows only

I have several sites all over France.
For each site I have a network 192.168.1.x.

The "elected" computers transmit the network scan, several hundreds of pc, discover and snmp.
How to associate a scan with a geographic site?
Is it possible to identify the computer that provided the scan?

Thanks for your help